diff --git a/src/Lifecycle.js b/src/Lifecycle.js
index 0ddb7e9aae..c03a958840 100644
--- a/src/Lifecycle.js
+++ b/src/Lifecycle.js
@@ -35,6 +35,7 @@ import { sendLoginRequest } from "./Login";
 import * as StorageManager from './utils/StorageManager';
 import SettingsStore from "./settings/SettingsStore";
 import TypingStore from "./stores/TypingStore";
+import {IntegrationManagers} from "./integrations/IntegrationManagers";
 
 /**
  * Called at startup, to attempt to build a logged-in Matrix session. It tries
@@ -580,6 +581,7 @@ async function startMatrixClient(startSyncing=true) {
         Presence.start();
     }
     DMRoomMap.makeShared().start();
+    IntegrationManagers.sharedInstance().startWatching();
     ActiveWidgetStore.start();
 
     if (startSyncing) {
@@ -638,6 +640,7 @@ export function stopMatrixClient(unsetClient=true) {
     TypingStore.sharedInstance().reset();
     Presence.stop();
     ActiveWidgetStore.stop();
+    IntegrationManagers.sharedInstance().stopWatching();
     if (DMRoomMap.shared()) DMRoomMap.shared().stop();
     const cli = MatrixClientPeg.get();
     if (cli) {
diff --git a/src/integrations/IntegrationManagers.js b/src/integrations/IntegrationManagers.js
index 9df5d80ee1..573d251a7b 100644
--- a/src/integrations/IntegrationManagers.js
+++ b/src/integrations/IntegrationManagers.js
@@ -18,6 +18,9 @@ import SdkConfig from '../SdkConfig';
 import sdk from "../index";
 import Modal from '../Modal';
 import {IntegrationManagerInstance} from "./IntegrationManagerInstance";
+import type {MatrixClient, MatrixEvent} from "matrix-js-sdk";
+import WidgetUtils from "../utils/WidgetUtils";
+import MatrixClientPeg from "../MatrixClientPeg";
 
 export class IntegrationManagers {
     static _instance;
@@ -30,9 +33,28 @@ export class IntegrationManagers {
     }
 
     _managers: IntegrationManagerInstance[] = [];
+    _client: MatrixClient;
 
     constructor() {
+        this._compileManagers();
+    }
+
+    startWatching(): void {
+        this.stopWatching();
+        this._client = MatrixClientPeg.get();
+        this._client.on("accountData", this._onAccountData.bind(this));
+        this._compileManagers();
+    }
+
+    stopWatching(): void {
+        if (!this._client) return;
+        this._client.removeListener("accountData", this._onAccountData.bind(this));
+    }
+
+    _compileManagers() {
+        this._managers = [];
         this._setupConfiguredManager();
+        this._setupAccountManagers();
     }
 
     _setupConfiguredManager() {
@@ -44,14 +66,33 @@ export class IntegrationManagers {
         }
     }
 
+    _setupAccountManagers() {
+        const widgets = WidgetUtils.getIntegrationManagerWidgets();
+        widgets.forEach(w => {
+            const data = w.content['data'];
+            if (!data) return;
+
+            const uiUrl = w.content['url'];
+            const apiUrl = data['api_url'];
+            if (!apiUrl || !uiUrl) return;
+
+            this._managers.push(new IntegrationManagerInstance(apiUrl, uiUrl));
+        });
+    }
+
+    _onAccountData(ev: MatrixEvent): void {
+        if (ev.getType() === 'm.widgets') {
+            this._compileManagers();
+        }
+    }
+
     hasManager(): boolean {
         return this._managers.length > 0;
     }
 
     getPrimaryManager(): IntegrationManagerInstance {
         if (this.hasManager()) {
-            // TODO: TravisR - Handle custom integration managers (widgets)
-            return this._managers[0];
+            return this._managers[this._managers.length - 1];
         } else {
             return null;
         }
@@ -66,3 +107,6 @@ export class IntegrationManagers {
         );
     }
 }
+
+// For debugging
+global.mxIntegrationManagers = IntegrationManagers;
diff --git a/src/utils/WidgetUtils.js b/src/utils/WidgetUtils.js
index 5e127e48d5..1e47554914 100644
--- a/src/utils/WidgetUtils.js
+++ b/src/utils/WidgetUtils.js
@@ -340,6 +340,17 @@ export default class WidgetUtils {
         return widgets.filter((widget) => widget.content && widget.content.type === "m.stickerpicker");
     }
 
+    /**
+     * Get all integration manager widgets for this user.
+     * @returns {Object[]} An array of integration manager user widgets.
+     */
+    static getIntegrationManagerWidgets() {
+        const widgets = WidgetUtils.getUserWidgetsArray();
+        // We'll be using im.vector.integration_manager until MSC1957 or similar is accepted.
+        const imTypes = ["m.integration_manager", "im.vector.integration_manager"];
+        return widgets.filter(w => w.content && imTypes.includes(w.content.type));
+    }
+
     /**
      * Remove all stickerpicker widgets (stickerpickers are user widgets by nature)
      * @return {Promise} Resolves on account data updated